We also heavily restricted immigration until the impact of the Immigration Act of 1965 started to accumulate in the 70s, 80s, and beyond. There are lots of corr

We also heavily restricted immigration until the impact of the Immigration Act of 1965 started to accumulate in the 70s, 80s, and beyond. There are lots of correlations one can come up with to explain the change in balance between capital and labor and it is doubtful that any single variable is responsible for the majority of the change.